摘要
提出一种部分传输序列(partial transm it sequence,PTS)算法与载波预留法(tone reservation)相结合的算法来降低OFDM系统峰均功率比(peak-to-average power ratio,PAPR).传统的PTS算法可以在不使信号失真的情况下很好地降低高PAPR出现的概率,但是这种算法的缺点是计算量过大.而TR法虽有不用传递边带信息的优点,但当预留子载波取值小时会得不到理想的性能,取值过大又会浪费系统功率.联合算法在大大地降低了PTS计算量、TR预留载波取值小的同时,还保持了良好的PAPR性能,仿真结果验证了其有效性.
A method that combines partial transmit sequence （PTS） with tone reservation （TR） was proposed for the peak-to-average power ration （PAPR） reduction in OFDM system. Traditional PTS method could reduce the probability of the appearance of OFDM signals with high peak-to-average power ratio without distortion, but the defect of such a method is its high computation. TR needn＇t transmit side-information as an advantage, but when the value of reserved sub-carriers is low, it couldn＇t get good performance. And it is also a waste of system power when the value is high. The proposed method not only reduces the computation of PTS method when the value of reserved sub-carriers is low, but also keeps good performance of reducing PAPR. The simulation verified its efficiency.
出处
《应用科技》
CAS
2009年第4期15-18,共4页
Applied Science and Technology
关键词
峰均功率比
正交频分复用
部分传输序列
载波预留
peak-to -average power ration （PAPR）
（TR） OFDM
partial transmit sequence （PTS）
tone reservation
